Music-roller-actuating mechanism.



N0. 69|,898. Patented l-an. 28, I902.

F.,ENGELHARDT. MUSIC RULLER ACFUATING MECHANISM.

(Application filed Dec. 20, 19003 (No Model.) 2 Sheets-Sheet l-.-

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No. a9|,a9s. Patented Jan. 28, I902. F. ENGELHARDT.

MUSIC ROLLER ACTUATING MECHANISM.

(Application filed Dec. 20. 1900.)

2 Sheets-Sheet 2.

QNo Model.)

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UNITE STATES PATENT OFFICE.

FREDERICK ENGELHARDT, OF ST. JOI-INSVILLE, NEW YORK, ASSIGNOR OF ONE'I-IALF TO ALFRED P. ROTH, OF NEW YORK, N. Y.

MUSIC-ROLLER-ACTUATING MECHANISM.

. V SPECIFICATION formingpart of Letters Patent No. 691,898, dated January 28, 1902.

V v Application filed December 20, 1900. Serial No. 40,493. (No model.)

To aZZ whom it may concern.-

Be it known that I, FREDERICK ENGEL- HARDT, a citizen of the United States, and a resident of St.Johnsville,Montgomery county, State of New York, have invented certain new and useful Improvements in Music- Roller-Actuating Mechanism, of which the followingis a specification.

This invention relates to an improved mechanism for operating the music-rollers in the pneumatic attachments for pianos and other keyed musical instruments. By my invention an even spring-influenced motion is imparted to the music-rollers from a pair of pedals that simultaneously operate the bellows of the pneumatic action. The time of the music may be readily controlled by a handle that also serves to couple either one of the rollers to the power.

In the accompanying drawings, Figure 1 is a vertical section of my improved actuating mechanism for music-rollers on line 1 1, Fig; 2. Fig. 2 is a plan thereof; Fig. 3, a vertical cross-section, on an enlarged scale, on line 3 3, Fig. 1; Fig. 4, a similar section on line 4. 4, Fig. 1.. Fig. 5 is a section on line 5 5, Fig. 3, showing the side opposite to that illustrated in Fig. 1. Fig. 6 is adetail of the brakeshoe and brake-disk;-Fig. 7, a detail of the treadle-leve'r.

The letter a represents the frame of theinstrument.

b is the music-sheet, cthe air-duct bridge, 01 the levers for actuating the keys, 6 the music-sheet-delivery roller, and f the receivingroller, all as usual.

g represents the pedals, which operate simultaneously the pneumatic action and the music-sheet-feed rollers. The levers g of the pedals are connected to the driving-shaft g by a clutch g which is so constructed that the downward strokes of the levers will impart an intermittent rotating motion to shaft g. The shaft g is embraced by the levers 9 Fig. 1, and constitutes the fulcrum around which such levers oscillate. To the shaft 9 is connected by friction-coupling g a shaft h, intergeared by wheels 71. z" with the arbort'of a pair of helical springs '5 contained within housings 41 As the powershaft 9' is rotated it will wind up the springs '5 and these springs will simultaneously unwind at their other end to rotate by wheels 5 3" a shaftj. This shaft, by wheels j kfldrives a shaft 7a, which by train of wheels k k and Z drives a shaft Z, provided with sprocketwheel Z A chain m and sprocket-wheel n transmit motion of Wheel Z to a shaft 'n, which is free to slide in bearings n and is adapted to drive either one of the rollers ef or to set a speed-governor in manner hereinafter specified.

To shift the shaft 01, I provide a hand-lever 0, keyed to a shaft 0', upon which are mounted a loose gear-wheel 0 and a fast gear-wheel 0 6 5 The loose wheel 0 is provided with abutments 0 Fig. 5, adapted to be engaged by a pin 0 on shaft 0. The wheel 0 engages a rack 13, fast on a slide p, adapted to move on guides 19 and engaging a collar 02 of shaft 11,,

gear-wheels n 02 of which the wheel 01, is

adapted to intergear with a wheel f of roller f, while the wheel 12 is adapted to intergear with a loose wheel 6, that drives roller 8 by wheel e crossed belt 6 and pulley e The wheels 97. n are set closer together than the 86 wheels f 6, so that when either one of the rollers e f is driven the other roller becomes disengaged. The fast gear-wheel o of shaft 0 engages a rack q" of a bar g, which sets the brake of a speed-regulating governor. This governor is provided with aspindle r, driven from shaft 7.: by worm-wheel r and worm r Upon the spindle r is free to slide a toothed sleeve or brake-disk s, engaged by toothed sectors 3, carrying the centrifugal balls 3 c The sectors 5 are pivoted to a rotatable yoke 8 so that when the balls are thrown outward the brake-disk s will be raised upon the spindle 1". Against the brake-disk sis adapted to bear a brake-shoe t, Fig. 6, secured to one end of an elbow-lever t, influenced by spring 25 and turning on fulcrum 75 The lever t is operated by a cam u, fast on shaft a, which is intergeared with bar g by wheel (1 The operation is as follows: When the in- 10o strument is played by means of the pedals g, the pneumaticaction will be operated, and

the handle 0 is turned to shift shaft n toward the left from the position shown in Fig. 1, and to thus cause an engagement of the wheels a e,while the wheels n 1 become disengaged.

The object of the friction-coupling g is to cause the shaft g to slip at its connection'with' the shaft h whenever the power applied isso great that it would cause an excessive straining of the springs 2' What I claim is- The combination of a pedal-lever with a shaft embraced by said lever and constituting a fulcrum for the same, a clutch between the lever and shaft, a spring tensione'd by the shaft, a pair of rollers, a second sliding shaft adapted to be coupled to either of said rollers, and means for operatively connecting said second shaft to the spring, substantially as specified.

Signed by me at St. Johnsville, Montgomery county, State of New York, this 4th day of December, 1900.

FREDERICK ENGELHARDT,

Witnesses:

EDWARD R. HALL, ALFRED P. ROTH. 

